Originally posted by ror
but it's not free...
True, but based on my old Windows license for Opera 7 I was able to get a Linux license for free. They used to require you to buy separate licenses for each platform, but now one registration gets you licenses for all platforms. So if you have an old Opera license, it may be worth looking into.
At any rate, the beta is free, and I think you can use the program as long as you like if you don't mind the ad banner.
(And, though it's not open source, it's still a blow against the empire, right?)